Dumb question: How do I get the radio buttons in a group?

[Jason Bodnar <jbodnar buzzard kdi com>]

I must be missing something. I read the docs, tutorial and FAQ but there does
not seem to be any documentation on how to get the list of radio buttons in a
radio button group. 

Also, how do I determine if a radio button is selected or not?
-- 
Jason Bodnar
jason@shakabuku.org